表解锁

1 查出被锁的表信息

SELECT /*+ rule*/

a.sid, b.owner, object_name, object_type

FROM v$lock a, all_objects b

WHERE TYPE = ‘TM‘

and a.id1 = b.object_id;

--1.查出锁定object的session的信息以及被锁定的object名

SELECT l.session_id sid, s.serial#, l.locked_mode,l.oracle_username,

l.os_user_name,s.machine, s.terminal, o.object_name, s.logon_time

FROM v$locked_object l, all_objects o, v$session s

WHERE l.object_id = o.object_id

AND l.session_id = s.sid

ORDER BY sid, s.serial# ;

--2.查出锁定表的session的sid, serial#,os_user_name, machine name, terminal和执行的语句

--比上面那段多出sql_text和action

SELECT l.session_id sid, s.serial#, l.locked_mode, l.oracle_username, s.user#,

l.os_user_name,s.machine, s.terminal,a.sql_text, a.action

FROM v$sqlarea a,v$session s, v$locked_object l

WHERE l.session_id = s.sid

AND s.prev_sql_addr = a.address

ORDER BY sid, s.serial#;

--3.查出锁定表的sid, serial#,os_user_name, machine_name, terminal，锁的type,mode

SELECT s.sid, s.serial#, s.username, s.schemaname, s.osuser, s.process, s.machine,

s.terminal, s.logon_time, l.type

FROM v$session s, v$lock l

WHERE s.sid = l.sid

AND s.username IS NOT NULL

ORDER BY sid;

2 查出serial

SELECT sid,serial# FROM v$session WHERE sid = 662;

3 杀掉session

alter system kill session ‘662,44825‘;

SELECT ‘alter system kill session ‘‘‘||sid||‘,‘||serial#||‘‘‘;‘ FROM v$session WHERE username=‘DCDB‘;

4 查出是否有长时间执行的SQL

select a.sid, b.sql_text

from v$session a, v$sqlarea b

where a.sql_hash_value = b.hash_value

and a.sid in

(SELECT SID from GV$Session_longops where TIME_REMAINING > 0);